It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes, it was 29 years.

One might think that the money value of an invention constitutes its reward to the man who loves his work. But... I continue to find my greatest pleasure, and so my reward, in the work that precedes what the world calls success.

Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.

I find my greatest pleasure, and so my reward, in the work that precedes what the world calls success.

Let the future tell the truth, and evaluate each one according to his work and accomplishments. The present is theirs the future, for which I have really worked, is mine.